Furnace-door fastener



Sept. 13 1927.

H. w. MoRREALL FURNACE DOOR FASTENER Filed July 19. 1926 awuentoz Patented Sept. .13, 1927.

I ED/STA E I "HEBBEBT 'W. MQRREAL or PINE GROVE, PENNSYLVANIA.

" FURNACE-DOOR FAsirEivEn. 1

Application filed July 19,

. The doors offurnaces are frequently for'ced open by pressure from within due to various causes. Thisendangers the life and limb of the attendant by reasonof escaping steam, gases or water, besides materially interfering with the action of the furnace, and filling the'air with noxious odors, gases and products of combustion, all of which is objectionable and overcome by the present inventlon which provides means for securing the door when closed.

While the drawings illustrate a preferred embodiment of the inventiomit is to be .un-

derstood that in adapting the means to meet specific" needs and requirements, the design may be varied and such other changes in the minor details of-co'nstruction may be resorted towithin the-scope of the invention as claimed, without departing from the spirit thereof. V

For a full understandingof the invention and the merits thereof, reference is to be had to the following description and the drawings hereto attached,'in Which,

Figure 1 is a front View of a furnace door embodying the invention,

Figure 2 is an end View of the door and frame, with the invention applied,

'Figure 3 is a detail perspective view of the parts illustrated in Figure 2, a portion of the door and frame being broken away, and illustrating the manner of releasing the door latch by means of the handle, and

Figure 4 is a detail sectional View on the line 4-4 of Figure 2.

Corresponding and like parts are referred to in thefollowing description and designated inthe several views of the drawings by'like reference characters.

The numeral 1 designates the setting or body of a furnace having a door opening to which is fitted a frame 2. The door 3 is hinged to the frame 2 in any preferred way and When closed, is prevented from casual opening by the usual stop 4 and catch 5, the

latter constituting a projection of the door 3 and the stop 4 forming'a part of the frame 2. Asshown most clearly in Figure 2, the

flstop 4 is beveled in opposite directions for the'catch 5 to ride upon, the inner bevel I being. adjacent the frame 2 and coacting with the catch 5 to retain the door 3' in closed position in a manner well understood. In accordance with the present invention,

, a bracket 6 is attached to the end of the door frame 2 provided with stop 4 and is substan:

1926.] Serial so. 123,538.

tially of'V-form'and'is providedat its outer end or apex with an eye 7 which constitutes a bearing for the journal or pivot 12 of a latch 8. The latch 8 consists of a bar which is pivoted near its outer end to'the bracket 6 and which is disposed to have its inner end engage the catch 5 to prevent outward move ment thereof and the casual opening of the door 3 by any pressure exerted thereagains't from within the furnace. clines inwardly and downwardly, so that'the inner end in contact with the catch 5 is below a horizontal line passingthrough the pivot of the latch and in consequence the door 'is fastened or securelyheld against opening when the latch is in operative position, asjshown most clearly in Figure 2. A pin 9 pro ects laterally from the inner end of the latch 8 and is disposed between- The latch 8 in he members or legs of the bracket 6,.and 1 7 acts jointly with the spaced members of the bracket to limit the pivotal movement of the latch. V 2

The latch 8' is disposed in the path of the catch 5 and when closing the door 3 the catch 5 rides over the stop 4 and'beneath the catch 5 and when the door reaches a closed positionthe catch 5 engages the inner beveled portion of the stop 4 and the latch 8 clears the catch 5 and drops in front thereof and secures or fastensthe door against accidental opening from pressure exerted thereagamst within thefurnacea hen it is required to open the door 3 the outer end of the latch8 is depressed a distance to cause its inner end to clear the catch 5, when the door may be opened in theusual way. In many instances the door 3 is provided with a handle 10 which is pivoted to a lug formed upon the outer side of the door adacent the catch 5. In order that the handle 10 may be utilized as means for releasing the latch 8, the latter is provided at its outer end with a laterally disposed pin 11, and when it is required to open the door 3 the swinging end of the handle 10 is elevated to a point above the pin 11 and is swung latorally to engage over said pin. Downward pressure exerted upon the handle 10 operates the latch to clear the catch 5 anda pull upon the handle opens the door in the usual toinatically secure a door when closed and easy of operation to release and open the door when required.

Having thus described the invention, I

claim:

1. The combination with a furnace door provided with the unual stop and catch for retaining; the name in closed positioin oi :fastei'iing means comprising a latch mount ed upon the furnace and adapted to enga e the said catch and prevent casual disenga; e-

r ment thereof from the stop, the pivot ot the latch being; in a higher plane than the catch to admit of the etch lilt'lllill'rtf inwardly and bracket and adapted to incline inwardly and dowmvardly and engage the maid catch, to prevent :mcidcntal diecngraceinent thcrrot from the stop and a pin projecting laterally from the latch and disposed lwtwccn the upper and lower spaced ptn'tioin: oi the bracket and limited in its pivotal movement thereby.

3. The combination with a furnace door provided with the usual rtop and catch tor retaining it in closed position, a handle pivoted to the door, of a latch pivotally mounted upon the furnace and adapted to engage the said catch to prevent disengagement thereof from the stop, and having a lateral extension adapted to be engaged by the pivoted handle of the door; whereby the latch may be disengaged from the catch and the door opened by manipulation oi the pivoted handle.

-.l-. The combination with a :lurnaeo door provided with the usual stop and catch for retaining the door in closed position, of a substantially V-shaped bracket adapted to be mounted upon the furnace adjacent the stop and a latch pivoted adjacent its outer end to the said bracket and adapted to incline inwardly and downwardly and engage the catch to prevent accidental disengagement thereof tt'roin the stop.

a. The combination with a furnace door provided with the usual stop and catch for retaining the door in closed positioin of a V-shapcd bracketadapted to be mounted upon the furnace adjacent the stop, and ii ring: an eye at ite outer end, a latch pivoli adjacent its outer end to the bracket and adapted, to incline inwardly and downwardly to engage the catch. and prevent accidental disengagement thereof fron'l the Hop and a pin projecting laterally from the catch and o 'ierating between the members of the bracket.

in testimony whereoit l allix mv signature.

niinnnnrr W. ivuiinnnai ii. 1,. 8.1 

